Title:
船舶への小型ダクト適用判断方法
Document Type and Number:
Japanese Patent JP6433020
Kind Code:
B2
Abstract:
A ship setting a small duct of the present invention includes a propeller 10 and a duct 20, a propeller load condition of the ship's hull 1 in an actual sea is set to 1.0 or more and a vortex resistance of the ship's hull 1 in the actual sea is set to 10% or more, the duct 20 is a small duct, and a diameter Ddin of the duct 20 is set to 20% or more and 50% or less of a diameter Dp of the propeller 10. According to this, in an actual sea where a propeller loading is increased, cavitation is suppressed, and a load distribution of the propeller 10 in its radial direction which governs efficiency is optimized by using interference with respect to the small duct 20.
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Inventors:
Noriyuki Sasaki
Hideki Kawashima
Junichi Fujisawa
Kenichi Kume
Yasuo Ichinose
Hideki Kawashima
Junichi Fujisawa
Kenichi Kume
Yasuo Ichinose
Application Number:
JP2014558513A
Publication Date:
December 05, 2018
Filing Date:
January 27, 2014
Export Citation:
Assignee:
National Research and Development Agency Maritime, Port and Aeronautical Technology Research Institute
International Classes:
B63H5/16; B63H1/26; B63H5/07
Domestic Patent References:
| JP82486A | ||||
| JP9175488A | ||||
| JP2007230541A | ||||
| JP200016373A | ||||
| JP201095181A | ||||
| JP5690797A | ||||
| JP2006306304A | ||||
| JP2008260445A | ||||
| JP2007331549A |
Foreign References:
| US4309172 |
Attorney, Agent or Firm:
Shinichi Abe
Yoshihiro Shimizu
Yuji Tsujida
Takaaki Ota
Yoshihiro Shimizu
Yuji Tsujida
Takaaki Ota